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docs/api.md

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+# API Reference
+
+Base URL: `https://test-micro-alex-stable-1.kyndemo.live`
+
+## Items `/api/items`
+
+| Method | Path | Body | Response |
+|--------|------|------|----------|
+| GET | `/api/items` | — | Array of items |
+| POST | `/api/items` | `{name,description}` | Created item (201) |
+| GET | `/api/items/:id` | — | Item or 404 |
+| PUT | `/api/items/:id` | `{name?,description?}` | Updated item |
+| DELETE | `/api/items/:id` | — | `{deleted:id}` |
+
+## Observability
+| Path | Description |
+|------|-------------|
+| `/health` | `{"status":"UP"}` |
+| `/metrics` | Prometheus text format |